gcc/config/xtensa/predicates.md

   1 ;; Predicate definitions for Xtensa.
   2 ;; Copyright (C) 2005 Free Software Foundation, Inc.
   3 ;;
   4 ;; This file is part of GCC.
   5 ;;
   6 ;; GCC is free software; you can redistribute it and/or modify
   7 ;; it under the terms of the GNU General Public License as published by
   8 ;; the Free Software Foundation; either version 2, or (at your option)
   9 ;; any later version.
  10 ;;
  11 ;; GCC is distributed in the hope that it will be useful,
  12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;; GNU General Public License for more details.
  15 ;;
  16 ;; You should have received a copy of the GNU General Public License
  17 ;; along with GCC; see the file COPYING.  If not, write to
  18 ;; the Free Software Foundation, 59 Temple Place - Suite 330,
  19 ;; Boston, MA 02111-1307, USA.
  20
  21 (define_predicate "add_operand"
  22   (ior (and (match_code "const_int")
  23             (match_test "xtensa_simm8 (INTVAL (op))
  24                          || xtensa_simm8x256 (INTVAL (op))"))
  25        (match_operand 0 "register_operand")))
  26
  27 (define_predicate "arith_operand"
  28   (ior (and (match_code "const_int")
  29             (match_test "xtensa_simm8 (INTVAL (op))"))
  30        (match_operand 0 "register_operand")))
  31
  32 ;; Non-immediate operand excluding the constant pool.
  33 (define_predicate "nonimmed_operand"
  34   (ior (and (match_operand 0 "memory_operand")
  35             (match_test "!constantpool_address_p (XEXP (op, 0))"))
  36        (match_operand 0 "register_operand")))
  37
  38 ;; Memory operand excluding the constant pool.
  39 (define_predicate "mem_operand"
  40   (and (match_operand 0 "memory_operand")
  41        (match_test "!constantpool_address_p (XEXP (op, 0))")))
  42
  43 (define_predicate "mask_operand"
  44   (ior (and (match_code "const_int")
  45             (match_test "xtensa_mask_immediate (INTVAL (op))"))
  46        (match_operand 0 "register_operand")))
  47
  48 (define_predicate "extui_fldsz_operand"
  49   (and (match_code "const_int")
  50        (match_test "xtensa_mask_immediate ((1 << INTVAL (op)) - 1)")))
  51
  52 (define_predicate "sext_operand"
  53   (if_then_else (match_test "TARGET_SEXT")
  54                 (match_operand 0 "nonimmed_operand")
  55                 (match_operand 0 "mem_operand")))
  56
  57 (define_predicate "sext_fldsz_operand"
  58   (and (match_code "const_int")
  59        (match_test "INTVAL (op) >= 8 && INTVAL (op) <= 23")))
  60
  61 (define_predicate "lsbitnum_operand"
  62   (and (match_code "const_int")
  63        (match_test "BITS_BIG_ENDIAN
  64                     ? (INTVAL (op) == BITS_PER_WORD - 1)
  65                     : (INTVAL (op) == 0)")))
  66
  67 (define_predicate "branch_operand"
  68   (ior (and (match_code "const_int")
  69             (match_test "xtensa_b4const_or_zero (INTVAL (op))"))
  70        (match_operand 0 "register_operand")))
  71
  72 (define_predicate "ubranch_operand"
  73   (ior (and (match_code "const_int")
  74             (match_test "xtensa_b4constu (INTVAL (op))"))
  75        (match_operand 0 "register_operand")))
  76
  77 (define_predicate "call_insn_operand"
  78   (match_code "const_int,const,symbol_ref,reg")
  79 {
  80   if ((GET_CODE (op) == REG)
  81       && (op != arg_pointer_rtx)
  82       && ((REGNO (op) < FRAME_POINTER_REGNUM)
  83           || (REGNO (op) > LAST_VIRTUAL_REGISTER)))
  84     return true;
  85
  86   if (CONSTANT_ADDRESS_P (op))
  87     {
  88       /* Direct calls only allowed to static functions with PIC.  */
  89       if (flag_pic)
  90         {
  91           tree callee, callee_sec, caller_sec;
  92
  93           if (GET_CODE (op) != SYMBOL_REF
  94               || !SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_EXTERNAL_P (op))
  95             return false;
  96
  97           /* Don't attempt a direct call if the callee is known to be in
  98              a different section, since there's a good chance it will be
  99              out of range.  */
 100
 101           if (flag_function_sections
 102               || DECL_ONE_ONLY (current_function_decl))
 103             return false;
 104           caller_sec = DECL_SECTION_NAME (current_function_decl);
 105           callee = SYMBOL_REF_DECL (op);
 106           if (callee)
 107             {
 108               if (DECL_ONE_ONLY (callee))
 109                 return false;
 110               callee_sec = DECL_SECTION_NAME (callee);
 111               if (((caller_sec == NULL_TREE) ^ (callee_sec == NULL_TREE))
 112                   || (caller_sec != NULL_TREE
 113                       && strcmp (TREE_STRING_POINTER (caller_sec),
 114                                  TREE_STRING_POINTER (callee_sec)) != 0))
 115                 return false;
 116             }
 117           else if (caller_sec != NULL_TREE)
 118             return false;
 119         }
 120       return true;
 121     }
 122
 123   return false;
 124 })
 125
 126 (define_predicate "move_operand"
 127   (ior
 128      (ior (match_operand 0 "register_operand")
 129           (match_operand 0 "memory_operand"))
 130      (ior (and (match_code "const_int")
 131                (match_test "GET_MODE_CLASS (mode) == MODE_INT
 132                             && xtensa_simm12b (INTVAL (op))"))
 133           (and (match_code "const_int,const_double,const,symbol_ref,label_ref")
 134                (match_test "TARGET_CONST16 && CONSTANT_P (op)
 135                             && GET_MODE_SIZE (mode) % UNITS_PER_WORD == 0")))))
 136
 137 ;; Accept the floating point constant 1 in the appropriate mode.
 138 (define_predicate "const_float_1_operand"
 139   (match_code "const_double")
 140 {
 141   REAL_VALUE_TYPE d;
 142   REAL_VALUE_FROM_CONST_DOUBLE (d, op);
 143   return REAL_VALUES_EQUAL (d, dconst1);
 144 })
 145
 146 (define_predicate "fpmem_offset_operand"
 147   (and (match_code "const_int")
 148        (match_test "xtensa_mem_offset (INTVAL (op), SFmode)")))
 149
 150 (define_predicate "branch_operator"
 151   (match_code "eq,ne,lt,ge"))
 152
 153 (define_predicate "ubranch_operator"
 154   (match_code "ltu,geu"))
 155
 156 (define_predicate "boolean_operator"
 157   (match_code "eq,ne"))